Intended use - rafter.
Would be two joined boards be as strong as one of a larger size?
Minimum requirement is 140x45mm, maximum 190x70mm. I have timber 190x35mm. If I use two boards side by side, giving me 190x70mm, is this combination as strong as a single board 190x70mm or at least as one 140x45?
What are good ways to join such boards? Glue, nails, bolts, straps? Is there a technical term for this? I had difficulty searching for information, as most material found is for joining on a wrong side, ex making longer or wider boards, while I want thicker.
Size in mm is the actual size of dry finished timber.